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Irina-Kira [14]
4 years ago
8

Sodium (Na) and chlorine (Cl) combine together to form table salt (sodium chloride). Looking at the periodic table, which elemen

t would you predict could sodium combine within a way most similarly to chlorine?
A. iodine (I)
B. argon (Ar)
C. potassium (K)
D. magnesium (Mg)
Chemistry
2 answers:
hodyreva [135]4 years ago
7 0

Answer:

A. Iodine (falls in the same group as chlorine)

Explanation:

mario62 [17]4 years ago
5 0
Iodine as it is in the same group as chlorine
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When 1.550 g of liquid hexane (C6H14) undergoes combustion in a bomb calorimeter, the temperature rises from 25.87∘C to 38.13∘C.
AlladinOne [14]

Explanation:

1). The given data is as follows.

       T_{i} = 25.87^{o}C,      T_{f} = 38.13^{o}C

               C = 5.73 kJ/^{o}C

Hence, calculate the change in enthalpy of the reaction as follows.

      \Delta E_{rxn} = -C \times \Delta T

                     = -5.73 \times (38.13 - 25.87)^{o}C

                     = -70.25 KJ

As,  number of moles = \frac{mass}{\text{molar mass}}

                                    = \frac{1.55}{(6 \times 12 + 14 \times 1)}

                                    = 0.018 mol

Therefore, enthalpy of reaction in kJ/mol hexane is as follows.

            \Delta E_{rxn} = \frac{-70.25 KJ}{0.018 mol}

                          = -3.90 \times 10^{3} kJ/mol

Thus, we can conclude that \Delta E_{rxn} for the reaction in kJ/mol hexane is -3.90 \times 10^{3} kJ/mol .

2).  As we know that,

     Number of moles = \frac{mass}{\text{molar mass}}

                                  = \frac{1.55}{(7 \times 12 + 8 \times 1)}

                                   = 0.017 mol

       \Delta E_{rxn} = \E_{rxn} per mol \times \text{number of moles}

                      = -3.91 \times 10^{3} \times 0.017

                      = -65.875 kJ

As,    \Delta E_{rxn} = C \times \Delta T


                    -65.875 kJ = -C \times (37.57 - 23.12)^{o}C

                           C = 4.56 kJ/^{o}C

Hence, heat capacity of the bomb calorimeter is 4.56 kJ/^{o}C.

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3 years ago
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Answer:

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I think stirring is the right answer

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